ProMariner ProIsoCharge Battery Isolator 250Amp 1-Alt 2-Bat - 12VProIsoCharge Series Model ProIsoCharge250 13 Part No. 23123 System Volts DC 12 Max DC Amps 250 Amp Alternator Input1 Battery Outputs 2 Size 6. 95"(l) x 5. 875"(w) x 3. 125"(h) Weight4 lbs Significantly Smarter ProIsoCharge delivers digitally controlled alternator output distribution while protecting the health of engine start batteries. An industry changing design that provides intelligent and zero voltage loss isolation, charging of up to 3 other